JP2010142010A - Hybrid power supply device for self-propelled marker vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve such a problem that it is disclosed to use a generator as a power supply for a display device, however, if the time for driving the display device is prolonged, the time for driving the generator is also prolonged, thereby increasing a discharge amount of exhaust gas. <P>SOLUTION: A hybrid power supply device for a self-propelled marker vehicle includes: each battery 14 mounted in a self-propelled marker vehicle and having each charger 13 that executes charging while being connected to each electrical outlet 11a of a commercial power supply in a road management office; a generator 15 mounted in the self-propelled marker vehicle and connected to the chargers; a DC/AC converter 21 for converting a DC current of the batteries into an AC current; a display device B for displaying information according to work states or the like by an AC voltage of the DC/AC converter; and an AC power supply switching control unit that detects an output voltage of the DC/AC converter and switches from the batteries to the generator when detecting the output voltage below a prescribed value. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention is a self-propelled sign car for performing vehicle guidance, road information, etc. on a display board loaded on a vehicle at a road maintenance work site, basically using a battery as a power source, A self-propelled hybrid power supply for self-propelled beacon vehicles that reduces the amount of exhaust emissions by shortening the drive time of the generator as much as possible by driving and displaying the generator when the capacity of the battery drops About.

  A conventional power source for a self-propelled beacon is disclosed in, for example, Japanese Patent Laid-Open No. 2000-110122. In the invention of this application, a display device for displaying road conditions and traveling instructions is loaded on a truck and moved to a site at a road construction site or the like, and the display device is lowered onto the road at the site and attached to the display device. The generator or the battery of the truck is used as a power source and connected to a display device via the power source and a lead wire, and display is performed by the generator and the battery.

As another power source for self-propelled signs, Japanese Patent Laid-Open No. 2002-356132 discloses that a generator and a display device capable of displaying various information are loaded on a truck, and the generator is driven. Various information is displayed on the display device.
JP 2000-110122 A JP 2002-356132 A

  By the way, although invention of patent document 1 and 2 mentioned above is disclosing using a generator as a power supply of a display apparatus, when time to drive this display apparatus becomes long, for example, There has been a problem that the time for driving the generator becomes longer and the amount of exhaust gas discharged increases.

  Further, when the display device is driven for a long time using the track battery described in Patent Document 1 as a power source, the capacity of the battery is reduced, so the display device is driven while the track engine is driven. It will be. For this reason, contamination by exhaust gas has become more problematic than when the generator is driven.

  The present invention is intended to solve the above-mentioned problems. The purpose of the present invention is to install a battery for a display device on a truck and charge it at a road management office before going to a construction site or disaster site. When the display device is driven by the battery at the site and the battery capacity is reduced due to the display over a long time, the generator is driven to drive the display device and charge the battery at the same time. A hybrid power supply for self-propelled beacon vehicles that reduces the exhaust gas emissions by shortening the total drive time of the generator by driving the display device with the battery again when the battery capacity exceeds the specified value There is to offer.

  The hybrid power supply device for a self-propelled sign car according to the present invention achieves the above-mentioned object, and the means of claim 1 is mounted on a self-propelled sign car and connected to a commercial power outlet of a road management office. A battery equipped with a charger to be charged, a generator mounted on the self-propelled sign car and connected to the charger, a DC / AC converter for converting direct current of the battery into alternating current, A display device for displaying information according to work conditions by the DC / AC converter, and an output voltage of the DC / AC converter are detected. When an output voltage equal to or lower than a predetermined value is detected, the battery is switched to the generator. An AC power supply switching control unit, and by selecting and operating information according to work conditions etc. on an operation panel installed in a driver's cab or the like of the self-propelled sign car, the information is displayed on the display device side. The information is sent to the display device by the control means and displayed on the display unit. When the drive from the battery is switched to the drive to the generator, the generator is used as a power source. The display device is driven and the battery is charged.

  According to a second aspect of the present invention, in the first aspect, the control means includes a direct current voltage obtained via an AC / DC converter from a line for applying an alternating current voltage to the display device, and the self-propelled sign wheel. A DC voltage from a mounted vehicle battery is connected so as to be selectively applied, and when the AC power supply switching control unit switches from the battery to a generator, the DC voltage from the vehicle battery is supplied to the control means. Further, the present invention is characterized in that the display during switching from the battery to the generator is prevented from being temporarily turned off by preventing the power of the control means from being cut off.

  According to a third aspect of the present invention, when the display device is driven by the generator and the battery is charged in the first aspect, the battery has reached a preset capacity. When the AC power supply switching control unit detects this, the AC power supply switching control unit switches from driving the display device by the generator to driving by the battery.

  As described above, according to the present invention, in the initial display state, information corresponding to the work status is displayed on the display unit by the power source of the battery, and when the capacity of the battery decreases, the generator is driven to perform display. At the same time, the battery is also charged by the generator, so even if it is displayed for a long time at the construction site or disaster site, the amount of exhaust gas emission can be reduced by shortening the drive time of the generator. In addition, the generation time of noise generated by the generator can be shortened.

  Moreover, since the vehicle battery is used to supply power to the control means when switching from the battery to the generator, the instantaneous power interruption time of the display can be shortened as much as possible.

  Furthermore, switching from driving by the battery to driving to the generator is performed, the display by the generator is performed and the battery is charged, and when the capacity of the battery reaches a preset capacity, the display from the generator is changed by the battery. By switching to the display, the driving time of the generator is shortened, and the exhaust gas emission amount is reduced, and the noise generation time can be shortened.

  In the present invention, a battery is basically used as a power source, and when the capacity of the battery is reduced, a generator is driven to display and the battery is also charged.

Hereinafter, an embodiment of a hybrid power supply device for a self-propelled marker vehicle according to the present invention will be described with reference to the drawings.
In FIG. 1, A is a drive power supply device, and includes a power supply unit 1 and a power supply switching unit 2. The power supply unit 1 has two batteries with a commercial power outlet 11a installed in a road management office, an emergency power outlet 11b installed on the road, and a plug 12 connected to an outlet 15a of a generator 15 described later. The battery charger 13 includes four batteries 14 that are charged by the battery chargers 13, and a generator 15 that is activated when the capacity of the battery 14 is reduced and generates a voltage of AC 100 volts. .

  Each battery 14 is charged to a voltage of 12 volts, and is connected in series as an output to supply a voltage of 48 volts to the power supply switching device 2 described later. This is because the conversion efficiency when converting to 100 volt AC by the DC / AC converter 21 described later is improved, and the amount of current is reduced, so that it is possible to reduce the cost by using a thin electric wire. Because.

  The power supply switching unit 2 includes a DC / AC converter 21 (hereinafter referred to as DC / AC21) that converts direct current connected to the battery 14 via the switch SW1 into alternating current, and a line connected to the output of the DC / AC21. An AC power supply switching control unit 22 that monitors whether or not the converted AC voltage has fallen below a preset voltage and detects that the AC voltage has been reduced, and an AC power supply switching control unit 22 that sends an AC power supply switching signal to the control means 35 described later. 35, a battery start / stop control unit 23 for performing on / off control of the switch SW1 connected between the battery 14 and the DC / AC 21 by a command signal from the control unit 35, and activation of the engine by a command signal from the control means 35. And a generator start / stop control unit 24 for controlling the generator. The generator start / stop control unit 24 detects the generated voltage using a line branched from the AC 100 V line, which is the output of the generator 15, and sends the detected generated voltage to the control means 35.

  The AC power supply switching control unit 22 controls the switch SW2 for switching whether the DC / AC 21 is connected to the display device B described later or the generator 15 is connected to the display device B according to a command from the control means 35. Are performed synchronously.

  The AC power supply switching control unit 22 is supplied with a DC voltage through a line branched from the output line of the battery 14. This is because the capacity (voltage) of the battery 14 is monitored, and the AC voltage is low when the capacity of the battery 14 is low even when the AC voltage is a predetermined voltage, or even when the capacity of the battery 14 is greater than or equal to a predetermined value. If it is, the AC power source switching control unit 22 sends out an AC power source switching signal for switching from the battery 14 to the generator 15.

  Next, the configuration of the display device B shown in FIG. 2 will be described. Reference numeral 31 denotes an LED display power supply unit to which an AC voltage is supplied from the drive power supply device A, and reference numeral 32 denotes an output from the LED display power supply unit 31. A display unit in which LEDs for displaying characters and designs corresponding to the work situation selected by the operator's cab operation panel 5 are arranged in a matrix, and an AC / DC converter 33 that converts alternating current from the drive power supply device A into direct current. (Hereinafter referred to as AC / DC 33) and DC 24V switching for switching the power supply to the control means 35 from the AC / DC 33 to the vehicle battery 4 loaded on the truck when an AC power switching signal is input from the drive power unit A. 3 and a control means 35 having the configuration of FIG. 3 and performing the control shown in the flowchart of FIG.

  The output of the AC / DC 33 is also supplied to a diffused warning lamp 36 that is attached to the upper portion of the LED display section 32 and performs a blinking operation.

  Next, the configuration of the control means 35 in FIG. 3 will be described. The bus line of the control means 35 in which the CPU, the RAM storing the program data, etc. are incorporated is lower than the preset capacity of the battery 14. An AC power supply switching control unit 22 that sends a signal that detects this and switches the switch SW2 in response to a command from the control means 35; a cab operator panel 5 that sends a character or symbol information signal according to the work situation, etc .; A battery start / stop control unit 23 that switches the switch SW1 according to a command from the means 35, and a generator 15 that starts and stops the generator 15 according to a command from the control means 35 and sends the generated voltage of the generator 15 to the control means 35 An LED display power supply unit 31 for displaying information signals from the machine start / stop control unit 24 and the control means 35 on the LED display unit 32 is connected. That.

  Next, the operation will be described with reference to the flowchart of FIG. 4. The battery 14 is connected to the outlet 11a of the road management office with a plug 12 and is charged through the battery charger 13 (step S1). Wait until the information can be displayed. Then, when information is selected according to the situation of the work site by dispatching to a construction site or a disaster site and operating the operation room operation panel 5, the information is transmitted to the control means 35 (step S2).

  The control means 35 sends a command to close the switch SW1 to the battery start / stop control unit 23 and sends a command to turn on the line of the battery 14 through the switch SW2 to the AC power supply switching detection unit 22. The electric power converted into alternating current by / AC21 is applied to the LED display power supply 31 and the selected information is displayed on the LED display 32 (step S3).

  In this display state, when the display time by the battery 14 is, for example, 6 hours, when the work time related to the road maintenance work becomes long, the lighting of the LED display unit 32 by the battery 14 is maintained. It becomes difficult.

  Therefore, in the present invention, the capacity reduction of the battery 14 and the AC voltage from the DC / AC are monitored to switch to the generator 15. In other words, the capacity of the battery 14 is set in advance, or the AC power supply switching control unit 22 monitors whether or not the AC voltage converted by DC / AC has decreased (step S4). In step S4, when it is detected that the AC voltage or the capacity of the battery 14 has decreased, the AC power supply switching control 22 sends an AC power supply switching signal indicating that it has decreased below the set value to the control means 35 (step S5). ).

  The control means 35 sends a command for starting the generator 15 to the generator start / stop control unit 24 (step S6), and the generator start / stop control unit 24 starts starting the generator 15 and generating power. Charging of the battery 13 is started through the plug 12 connected to the outlet 15a of the machine 15 (step S7). Moreover, voltage monitoring is performed by the generator output line by starting the generator 15.

  Since the AC power supply switching signal from the AC power supply switching control 22 is also input to the DC24V switching unit 34, the power supply to the control means 35 to which power has been supplied from the AC / DC 33 is supplied to the vehicle battery 4 by the DC24V switching unit 34. (Step S8).

  Here, the reason why the power supply to the control means 35 is switched from the AC / DC 33 to the vehicle battery 4 will be described. When the LED display unit 32 is driven by the power of the battery 13 and the power is switched from the generator 15, the LED display is displayed. This is to prevent the supply of power to the power supply unit 31 from being temporarily interrupted and the display by the LED display unit 32 from temporarily disappearing.

  That is, paying attention to the fact that the display power source and the control power source of the display device B are converted from the AC 100 volts into the display device control power source and the LED display power source DC 24 volts, For example, the problem is solved by protecting the DC side power supply with a vehicle battery even if the control means 35 is reset for 10 ms. Moreover, even if the power of the vehicle battery 4 is used at the time of switching, the switching is instantaneous, so that the burden on the vehicle battery 4 is small and no problem occurs in normal operation.

  In step S7 described above, it is detected that the AC 100 volts from the generator 15 is stable, and the output is sent to the control means 35. The control means 35 instructs the AC power supply switching control section 22 to switch the switch SW2. The AC power supply switching control unit 22 switches the connection to the generator 15 from the connection state with the DC / AC 21 and supplies the power from the generator 15 to the AC 100 volt line (step S9).

  Simultaneously with the command signal to the AC power supply switching control unit 22, a command to open the switch SW1 connected to the battery line is sent to the battery start / stop control unit 23 (step S10), and the display device B generates power. Information is displayed on the LED display unit 32 by the power from the machine 15 (step S11).

  Since the AC power source switching control unit 22 constantly monitors the capacity of the battery 14, when the AC power source switching control unit 22 determines that the preset capacity has been reached, a signal is sent to the control means 35 and the AC power source switching control unit 22 By outputting the power switching signal, the control means 35 causes the command to stop the generator 24 and the battery start / stop control unit 23 and the AC power switching control unit 22 to switch SW1 and SW2 by the reverse operation to the above. By performing the switching command, the driving of the display device B by the battery 14 is resumed. Therefore, the amount of exhaust gas discharged can be reduced as compared with the case where the LED display unit 32 is lit until the work is completed in the generator 24. .

  As described above, when the LED display unit 32 is driven by charging the battery 14 from the commercial power source, and when the LED display unit 32 is driven by the generator 15, the commercial power source emits exhaust gas compared to the generator. Since the amount is 1/5, the amount of exhaust gas discharged can be reduced by displaying the LED display 32 with the battery 14.

  In the above-described embodiment, the battery 14 is charged in advance from a commercial power source in a road management office, and the generator 15 is driven when the capacity of the battery 14 decreases. If a commercial power source is installed on the road shoulder, the LED display 32 may be turned on by inserting the plug 12 into the emergency power outlet 11b installed on the road shoulder without driving the generator 15. In this case, it is possible to obtain an effect that the emission amount of the exhaust gas is smaller than when the generator 15 is driven.

It is a circuit block diagram which shows the drive power supply device of the hybrid power supply device for self-propelled beacon vehicles which concerns on this invention. FIG. 2 is a circuit block diagram of a display device connected to the drive power supply device of FIG. 1. It is a circuit block diagram of the control means in the display apparatus of FIG. It is a flowchart for demonstrating operation | movement.

Explanation of symbols

A Drive power supply device B Display device 1 Power supply unit 11a Commercial power outlet of road management office 13 Battery charger 14 Battery 15 Generator 2 Power supply switching unit 21 DC / AC converter 22 AC power supply switching control unit 23 Battery start / stop control unit 24 Generator start / stop control unit 31 LED display power supply unit 32 LED display unit 33 AC / DC converter 34 DC24V switching unit 35 Control means

Claims (3)

A battery equipped with a charger that is mounted on a self-propelled sign car and connected to a commercial power outlet of the road management office, and charged,
A generator mounted on the self-propelled sign car and connected to the charger;
A DC / AC converter for converting direct current of the battery into alternating current;
A display device for displaying information according to the work situation by the DC / AC converter;
An output voltage of the DC / AC converter is detected, and when an output voltage equal to or lower than a predetermined value is detected, an AC power source switching control unit that switches from the battery to the generator is configured.
By selecting and operating information according to road conditions with an operation panel installed in the driver's cab or the like of the self-propelled sign car, the information is sent to the control means on the display device side, and the information is sent by the control means. Is sent to the display device and displayed on the display unit, and when the drive from the battery is switched to the drive to the generator, the display device is driven and the battery is charged by using the generator as a power source. A hybrid power supply device for a self-propelled sign car characterized by being performed.   The control means selectively receives a DC voltage obtained via an AC / DC converter from a line for applying an AC voltage to the display device, and a DC voltage from a vehicle battery mounted on the self-propelled sign car. When connected from the battery to the generator by the AC power supply switching control unit, the DC voltage from the vehicle battery is supplied to the control means to prevent the control means from being turned off and the generator from the battery is connected. 2. The hybrid power supply device for a self-propelled beacon according to claim 1, wherein a display when switching to is temporarily prevented from being turned off.   When the display unit is driven by the generator and the battery is charged, the AC power supply switching control unit detects that the battery has reached a preset capacity. 2. The hybrid power supply device for a self-propelled beacon according to claim 1, wherein the power supply switching control unit switches the drive of the display device by the generator to the drive by the battery.

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